Manufacture of cylinders for burring of wool



' P. A. CALVERT, CYLINDER FOR BURRING, OPENING, PIGKING, GARDING 6m,GO'I'TON,

WOOL, &c.

No. 6,044. Patented Jan. 23, 1849.

UNITED smarts orator.

FRANCIS A. CALVERT, OF LOWELL, MASSACHUSETTS.

MANUFACTURE CYLINDERS FOR BURRING OF WOOL, 8w.

Specification of Letters Patent No. 6,044, dated January 23, 1849.

To all whom it may concern:

Be it known that I, FRANoIs A. CALVERT, of Lowell, in the county ofMiddlesex and State of Massachusetts, have invented new and usefulImprovements in Cylinders for Burring, Opening, Picking, Carding, andPerforming all other Similar Operations on Cotton, Wool, or otherFibrous Materials, ancl that the following description, taken inconnection with the accompanying drawings, hereinafter referred to,forms a full and exact specification of the same, wherein I have setforth the nature and principles of my said improvements by which myinvention may be distinguished from others of a similar kind, togetherwith such parts as I claim and desire to have secured to me by LettersPatent.

The cylinders, which have heretofore been devised, and which are now ingeneral use for the production of the several effects on cotton, wool,&o., above specified, have mainly been composed of a series of saw ortoothed circular plates, arranged on a hol low or solid shaft, theplates being set on said shafts at proper intervals apart, by insertingbetween them disks of wood or pasteboard, of less diameter than saidplates or bywinding wire between the said plates: the object ofproviding said spaces being to permit the fibers of the cotton, &o., to

'pass freely into the said spaces, while the teeth of the platesdisengage the burs and other foreign substances from the same.

This method of constructing said cylinders is quite expensive, and theobject of my improvements is, to produce them at a much less cost to themanufacturer, while at. the same time they are as durable, perfect andeffectual in the production of the desired results, as those now in use;my new method of construction superseding the use of disks of wood, &o.,and of any packing between the toothed plates.

The figures of the accompanying plate of drawings, represent my improvedcylinder.

Figure l is a plan of the same. Fig. 2 is a transverse vertical section,and Figs. 3, 4, 5 and 6 are detail views, which will be hereinafterreferred to.

The essential characteristics of my improvements, consist in windingupon a me- .tallic cylinder, A A, Figs. 1 and 4, of proper diameter,toothed wire either in a spiral direction from each side to the centerthereof, or straight about the same; the said toothed wire being formedand'produced, substantially, as follows.-The wire, which is common ironwire, is taken first in its cylindrical shape, and by being passedthrough calender rolls, is pressed into a fiat, shape, whichconsolidates, and strengthens the metal. It isthen passed through aplaning machine, by which a shaving can be taken off from one or bothsides of the same, so as to leave a flange, as shown in Figs. 5 and 6,at a, a, a. The teeth are then formed by punching or cutting out, atproper intervals along the wire, pieces of the same, so as to leave theteeth of the required shape for the production of the desired effect;the shape of the teeth being shown in Figs. 2 and 3. The wire of theshape described, and represented inthe drawings, may be produced inother modes; but this is deemed by me to be the cheapest and mostsuccessful.

In order to fasten the wire upon the pein position. Another mode offastening the wire upon the periphery of the cylinder is, by winding,and soldering the same, by any of the well known methods, upon saidperiphery, either in a straight or spiral direction, as shown in Fig. 4;which forms as perfect a 'burring cylinder, &o., as can be produced bythe method, just above explained.

Having thus described my improved mode of constructing a cylinder forburring, opening, &o., cotton, wool and other fibrous materials, I shallstate my claim as follows. v

What I claim as new, and desire to have secured to me by Letters Patentis- A cylinder for burring, opening picking, carding, and performing allother similar operations, on cotton, wool, &o., formed or produced bywinding toothed wire, (having flanges and teeth, as hereinabovespecified,)

upon the periphery of a metallic cylinder, description of my saidinvention I have either in a spiral or straight direction, hereto set mysignature this fourth day of whether the said Wire be fastened thereonin May, A. D. 1848.

spiral grooves, and properly staked, or by FRANCIS A. CALVERT. 5soldering or otherwise, as hereinabove sug Witnesses:

gested. EZRA LINCOLN, Jr.,

In testunony that the foregoing is a true GRIDLEY V. F. BRYANT.

